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本文介绍的液压调速系统活塞杆运动的自动计时装置，较好地解决了在节流调速回路性能测试中，活塞杆运动行程的准确计时问题，使测试数据更加准确。
In this paper, the automatic timing device of the piston rod movement of the hydraulic governor system, which solves the accurate timing problem of the piston stroke in the performance test of the throttling speed control circuit, makes the test data more accurate.